phosphor-log-manager: Fix for deserialize cereal exception

This commit provides a fix for an issue in which the cereal
deserialize() would crash the phosphor-log-manager incase
persistence file is empty in restore path.

Resolves openbmc/openbmc#2337

Change-Id: Id9d8c066d0dc50cba62a67060c1ee8d43d046ff1
Signed-off-by: Jayanth Othayoth <ojayanth@in.ibm.com>
1 file changed